Impact rotor for stone breakers



Feb. 19, 1952 L. H. KESSLER IMPACT ROTOR FOR STONE BREAKERS Original Filed March 1, 1943 Patented Feb. 19, 1952 2,585,943 IlVIPACT Ro'roR FoR- STONE BREAKERS Lee H. Kessler, Springville, N. "Y., "assigno'r of one-fourth to Harriet F. Derrick, one-fourth to Norman H. Kessler and one-fourth to Nellie H. Kessler, all of Springville, N.

Original application March '1, 1943, Serial No. 492,980. Divided and this application January 27, 1949, Serial No. 73,167

1 Claim. 1

- This invention relates to certain new and useful improvements in equipment for breaking or crushing stone and like material, but more particularly to the impact rotors employed in connection therewith, and is a division of my Patent No. 2,486,421, issued November 1, 1949.

It has for one of its objects to provide a rotor of this character having simple and reliable means for detachably supporting the impact blades thereon and for eifecting their ready installation and removal in a minimum period of time.

Another object of the invention is to provide an impact rotor having reversible blades together with novel clamping means for positively retaining them against displacement both axially and radially of the rotor.

Other features of the invention reside in the construction and arrangement of parts hereinafter described and particularly pointed out in the appended claim.

In the accompanying drawings:

Figure 1 is a sectional side elevation of a stone breaker showing my impact rotors. Figure 2 is a detached perspective view of one of the rotors. Figure 3 is an enlarged fragmentary cross section taken on line 3-3, Figure 4. Figure 4 is a fragmentary horizontal section taken on line 4-4, Figure 3. Figure 5 is a detached perspective View of one of the impact elements or blades.

Similar characters of reference indicate corresponding parts throughout the several views.

By way of example, I have shown my invention in connection with a double impeller impact crusher or breaker Which functions to break up or crush stone and like material by impact and while in suspension. It consists of a casing or housing Hl forming an enclosed crushing or breaking chamber into the upper end of which the stone to be crushed is delivered, as through a feed opening H, while the crushed stone is discharged from the lower end at I2. Disposed in the casing at opposite sides of the vertical center thereof are oppositely rotatable impact members in the form of rotors or impellers l3 which are mounted side by side on companion drive shafts [4 extending transversely through the casing between the inlet and discharge ends thereof and journaled at their ends in bearings I5. These rotors have impact elements or blades l6 thereon and are adapted to be driven at a high rate of speed in opposite directions so that the opposing faces thereof turn upwardly and tend thereby to direct the intercepted material, delivered between the rotors, upwardly and outwardly toward 2 the top and opposite ends of the casing. A substantial space is provided above the rotors .to afford a crushing zone for the rotor-trajected suspended stone and disposed in predetermined fashion in the casing and in correlation to the rotors are stationary impact bars ll, l8 extending transversely thereof and against which the stone is trajected by the rotors and further broken or reduced from the resulting impact. The bars I! are disposed substantially axially over the perspective rotors, while the companion impact bars I 8 are disposed in a row along the ends of the casing in spaced relation to the end walls thereof and the rotors and extend upwardly to a point adjacent the top of the casing. Some of these impact bars 3 may be supported in the opposite side walls of the casing while others adjoining the rotors may be supported as a unit in side plates i9 adapted for yieldable movement toward and from the companion rotor, as when some hard, non-crushable object is encountered. Furthermore, these impact bars are properly spaced and function as a screen to size the stone before it is discharged from the machine by gravity along the ends of the casing and through the discharge opening 12.

The impact blades 16 are reversible and are so mounted in the rotor l3 that they can be readily reversed or replaced when necessary in a minimum period of time and without disturbing the rest of the machine. To this end, each blade is shaped as shown in Figure 5 to provide two impact heads 20 along its opposite sides in coextensive relation thereto with a reduced connecting web 2! therebetween and adapted to be removably seated in a companion groove or recess 22 formed in the periphery of the rotor and extending parallel to its axis. This groove is undercut and of a cross section simulating that of one of the blade-heads and its connecting web, as seen in Figure 3, whereby the blade is effectually held against radial displacement with one of its heads projecting from the rotor for impacting engagement with the stone. At one side of its web-receiving portion and opening endwise of the rotor, the blade-receiving groove 22 has laterally-extending recesses or channels 23 whose side walls or those walls in opjaws to detachably hold the latter in place and effectually wedge and retain the rotor-blade against endwise displacement relative to the rotor. Upon removing the bolt and the clamping jaws, the blades can be readily slipped from their rotor grooves. To facilitate the reversal and replacement of the blade when necessary, the opposite side walls of the casing have alining openings 26 therein in endwise register with a given radial position of the blades to permit the insertion and removal of one or another of the blades to and from the rotors without dismounting the latter. or otherwise disturbing the machine. Normally these openings are closed by cover-plates 21 detachably held in place by latching bars 28.

I claim as my invention:

An impact rotor, comprising a body having longitudinal grooves in the periphery thereof, rotor blades detachably fitted in said grooves substantially radially of the rotor and having impact heads on its opposite longitudinal faces with a straight-sided connecting web therebetween defining laterally inclined shoulders, said grooves being substantially of the same cross section as said blades to slidably receive and retain them against radial displacement with one of the heads projecting beyond the rotor-periphery, the opposite ends of the rotor adjoining one side of the web-receiving portion of each groove having endwise-opening inwardly-tapering recesses in lateral communication therewith, and clamping members having tapered outer faces detachably fitted in opposing relation in said recesses for wedging contact along their outer faces with the companion tapered portions of the recesses and for bearing contact along their inner and bot tom faces with the adjoining straight and inclined faces of the web and inner head portion, respectively, of the companion blade for resisting its radial and endwise displacement.

LEE H. KESSLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,491,416 Plaisted Apr. 22, 1924 2,086,383 Gruender July 6, 1937 2,110,850 Symons Mar. 8, 1938 2,223,584 Symons Dec. 3, 1940 2,258,075 Symons Oct. 7, 1941 2,349,960 Hall May 30, 1944 2,373,691 Kessler Apr. 17, 1945 2,414,591 Fowler Jan. 21, 1947 FOREIGN PATENTS Number Country Date 2,930 Great Britain of 1885 456,445 Great Britain Nov. 9, 1936 

